Adjustable Torque Wrench Lock Device and Display Window
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Solution Overview
Problem
Conventional adjustable torque wrenches lack a lock device to prevent unauthorized operation and often require frequent recalibration due to unclear or unreadable torque readings.
Innovation Solution
An adjustable torque wrench design featuring a lock device with a gear wheel mechanism and a displayer device that includes a tubular lever with a window for clear torque reading display, utilizing a compression spring and adjusting screw system with a graduation barrel visible through the window, and a handle with a lock mechanism to secure settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no lock device is provided in conventional adjustable torque wrenches, then the device remains simple and easy to operate, but the wrench can be easily operated by unauthorized people and requires frequent recalibration
Solution Approach 1:
The lock device is segmented into distinct functional components: a lock button for actuation, a lock pawl for engagement, and a ratchet gear for torque adjustment. This segmentation allows the locking function to be added without redesigning the entire wrench, maintaining simplicity while providing security against unauthorized operation.
2Measurement precision
If no displayer device is provided, then the device structure remains simple, but the torque reading cannot be clearly seen by users
Solution Approach 1:
A displayer device acts as an intermediary between the torque measurement mechanism and the user. It includes a display window that visually presents the torque reading, allowing users to clearly see the measurement without directly observing complex internal mechanisms. This intermediary component enhances readability while adding minimal structural complexity.
3Reliability
If the torque reading is not clearly displayed, then the device structure remains simple, but the wrench requires frequent recalibration
Solution Approach 1:
The displayer device provides visual feedback to users about the current torque setting through a clearly visible reading window. This feedback mechanism allows users to verify torque values during operation, ensuring accurate application and reducing the need for frequent recalibration. The feedback loop between the measurement system and user observation enhances reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively locks the wrench to prevent unauthorized use and clearly displays torque readings, reducing the need for frequent recalibration by providing a secure and readable interface for users.
Implementation Method 1
a compression spring engaged with the roller carrier for applying a compression force onto the roller carrier and the driving shank
Implementation Method 2
an adjusting screw threaded with the lid of the tubular lever and rotatable and adjustable relative to the lid and the tubular lever for adjusting the adjusting screw longitudinally relative to the tubular lever
Data Source
AI summary
An adjustable torque wrench includes a driving shank pivotally coupled to a tubular lever and biased with a compression spring, an adjusting screw for adjusting a compression force of the compression spring, and a barrel attached to the adjusting screw and rotated in concert with the adjusting screw and having a graduation aligned with a window of the tubular lever for allowing the graduation of the barrel to be seen through the window of the tubular lever, a control ferrule is slidably engaged with the adjusting screw for rotating the adjusting screw to adjust the compression force of the compression spring, and a lock device attached to a handle for selectively anchoring the control ferrule to the handle.